Question # 1

The temperature of 1 kg of hydrogen gas is the same as that of 1 kg of helium gas if.

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The gases have the same internal energy

The gas molecules occupy equal volumes

The gas molecules have the same root mean square speed

The gas molecules have same mean translational K.E.

It is possible is distinguish between transvers and longitudinal waves from the property of.

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Refraction

Interference

Diffraction

Polarization

The particles equal in mass or greater than protons are called.

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Mesons

Bosons

Baryons

Nucleons

The temperature scale based upon triple point of water was given by

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Rumford

Carnot

Kelvin

Celsius

A body of mass 3 kg lies on the surface of the table 2 m high it is moved on the surface 4 m the change in P.E. will be.

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9.8 J

6 J

Zero

329 J

X-rays are

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Longitudinal wave

Transvers waves

Secondary waves

Fast sound waves

If T1 and T2 are source and sink temperature respectively Carnot efficiency is.

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T1+T2/T1

T1-T2/T1

T1+T2/T2

T1-T2/T2

An instrument used to find the direction of the earths magnetic field is known as.

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Magnetometer

Electroscope

Cyclotron

Particle accelerator

Wattles current is said to flow when phase angle between virtual current and virtual voltage is

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0^o

90 ^o

180 ^o

270^o

The most suitable material for moderator in a nuclear reactor is.

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B

Cd

D2O

Uranium

Para magnetism is.

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A distrotion effect

An orientation effect

A skin effect

A resistance

If in Young's double slit experiments the separation between two slits is halved then the fringe width

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Remains unchanged

Becomes double

Reduces to half

Becomes 3 times

Air bubble in water shines because of

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Reflection

Refraction

Diffraction

Total internal reflection

The rectangular coil in galvanometer is made up of.

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Bare copper wire

Insulated aluminum wire

Enameled copper wire

Enameled steel wire

The cause of ferromagnetism is.

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Orbital motion of elections

spin Motion of electrons

Permanent dipole memento

Spin angular momentum

How eddy current losses are reduced in A F and R F transformers.

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By using air cores

By using shell cores

By using laminated cores

By using ferrite cores

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

An object falls freely under gravity the vertical equilibrium of the body inside is

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Stable

Unstable

Neutral

Unknown

Time period of a simple pendulum depends upon.

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Thickness of the thread

Mass of the pendulum

Length of the pendulum

Amplitude of vibration

Which of the following is an example of diamagnetic substances.

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Nickel

Chromium

Antimony

Cobalt

If you float in water with just your nose out the average density of your body must be

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Same as that of water

Greater than that of water

Less than that of water

Zero

The nucleus of tritium is called.

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Proton

Triton

Deuleron

Positron

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

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Intensity of incident light

Electric field near the photocathode

Frequency of incident light

Polarization of incident light

Eddy current can be minimized by

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Moving the conductor rapidly

Moving the conductor slowly

Using a metallic core

Using a laminated core

Which type of image is formed by a concave lens on a screen.

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Inverted and real

Inverted and virtual

Upright and real

Upright and virtual

If the average velocity of an object is zero in some time internal the displacement of the object for that intercanal will be.

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Infinite

zero

Increase

Decreasing

When a direct current is passed though a junction formed of two dissimilar metals the junction becomes warmer or cooler depending on the.

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Current direction

Thermocouple used

Temperature gradient

Amount of current

A tin film of liquid is enclosed between two glass plates it is difficult to spates the plates on account of.

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Surface tension

Atmospheric pressure

Viscosity

Friction

The fact that the edge of a shadow formed by a point source of light shining on an object is not sharp is an example of.

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Refraction

Diffraction

Polarization

Dispersion

The loudness of a sound depend on its

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Frequency

Amplitude

Speed

Both a and b

In case of a convex lens, when object is placed at F

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the image is formed beyond 2 F

the image is formed between F and 2 F

No image is formed

the image is formed behind the object

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